I deadstick in everytime, so I know the tank and engine are empty....its just one of those things every body does differently...I'll be wiping down my plane while a flyin bud is pumping his tank empty...but then he fires it up to run out the fuel in the engine...I run mostly small stuff at %25 nitro....it goes in everything from .010 up to .15, after that I drop to %10-15 for upto .65 saito...Rog